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This is the free Material Data Center Datasheet of CELANEX® PBT 357 FR - PBT - Celanese

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Processing/Physical Characteristics - Mechanical properties - Thermal properties - Other properties
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Processing/Physical CharacteristicsValueUnitTest Standard
ISO Data
Melt volume-flow rate, MVR 0.8 cm³/10min ISO 1133
Temperature 250 °C -
Load 2.16 kg -
Molding shrinkage, parallel 0.7 % ISO 294-4, 2577
Molding shrinkage, normal 0.6 % ISO 294-4, 2577
Mechanical propertiesValueUnitTest Standard
ISO Data
Tensile Modulus 1981 MPa ISO 527
Yield stress 47 MPa ISO 527
Yield strain 4.9 % ISO 527
Charpy impact strength, +23°C N kJ/m² ISO 179/1eU
Charpy notched impact strength, +23°C 17 kJ/m² ISO 179/1eA
Charpy notched impact strength, -30°C 9 kJ/m² ISO 179/1eA
Thermal propertiesValueUnitTest Standard
ISO Data
Temp. of deflection under load, 1.80 MPa 94 °C ISO 75-1/-2
Temp. of deflection under load, 0.45 MPa 105 °C ISO 75-1/-2
Vicat softening temperature, B 113 °C ISO 306
Other propertiesValueUnitTest Standard
Density 1280 kg/m³ ISO 1183
Characteristics
Processing
Injection Molding
Delivery form
Pellets
Other text information
Injection molding
To avoid hydrolytic degradation during processing, CELANEX resins have to be dried to a moisture level equal to or less than 0.02%. Drying should be done in a dehumidifying hopper dryer capable of dewpoints <-30°F (-34°C) at 250°F (121°C) for 4 hours.
Rear Temperature 480-520(249-271) deg F (deg C)
Center Temperature 480-530(249-276) deg F (deg C)
Front Temperature 480-530(249-276) deg F (deg C)
Nozzle Temperature 480-530(249-276) deg F (deg C)
Melt Temperature 480-520(249-271) deg F (deg C)
Mold Temperature 80-180(27-82) deg F (deg C)
Back Pressure 50-100 psi
Screw Speed Medium
Injection Speed Fast

Injection speed, injection pressure and holding pressure have to be optimized to the individual article geometry. To avoid material degradation during processing low back pressure and minimum screw speed have to be used. Overheating of the material has to be avoided, in particular for flame retardant grades.
Disclaimer
Copyright Altair Engineering GmbH. Altair Engineering GmbH assumes no liability for the system to be free of errors. The user takes sole responsibility for the use of this data under the exclusion of every liability from Altair Engineering GmbH; this is especially valid for claims of compensation resulting from consequential damages. Altair explicitly points out that any decision about the application of materials must be double checked with the producer of this material. This includes all contents of this system. Copyright laws are applicable for the content of this system.
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